The experimental pipeline operator |> (currently at stage 1) pipes the value of an expression into a function. This allows the creation of chained function calls in a readable manner. The result is syntactic sugar in which a function call with a single argument can be written like this:

let url = "%21" |> decodeURI;

The equivalent call in traditional syntax looks like this:

let url = decodeURI("%21");

Syntax

expression |> function

The value of the specified expression is passed into the function as its sole parameter.

Examples

Chaining function calls

The pipeline operator can improve readability when chaining several functions.